Sheet pulling device



site directions.

Patented Apr. 9, 1935 V "UNITED STATES SHEET IPUVLLING DEVICE David G. Davies, Morgantown, w. Va. Application November 7, 1933, Serial No. 697,029 I a 01mins. (01. 29-17) This invention is a device for separating metal sheets as they are delivered during fabrication.

In connection with thefabrication of metal sheets there is often'difiicultyin separating be- 7 ing, and to facilitate the discovery and removal of defective sheets.

The invention will be hereinafter fullyset forth and particularly pointed out in the claims.

In the accompanying drawing:- I 1 Figure I is a front "elevation of a sheetpulling device constructed in accordance with the invention. Figure 2 is a top plan view. Figure 3 is an end view. Figure 4 is a transverse sectional view.

Referring to the'drawing, two sets of rolls A and B are provided, the sets being arranged adjacent each other, as shown in the drawing. The set A consists of a bottom roll IE! and a top roll I I, and the set 13 consists of 'a bottom roll I a and a top roll I Ia.

Each set of rolls is mounted in spaced apart vertical standards I2, secured to a base X in suitable manner, as by means of bolts I3 passed through flanges on the bottoms of the standards. Each bottom roll is provided with reduced end necks I 4, which rest upon bearing blocks I5, and are retained in place by bearing blocks IS in a manner well understood in the art of supporting rollers.

The upper rolls of each set are also provided" with reduced end necks I1, said necks being r0- tatably mounted in blocks I8, which are vertically adjustable by any suitable means. For purposes cf illustration, screw shafts I9 are shown, rotatably mounted in the upper cross bars 2!! of the frame bars I2. It will be readily observed that by adjusting the screws I9, the upper roller maybe raised or lowered with respect. to the lower roll, depending upon the directionof r0 tation of said screws.

The rollers II! and Illa are provided at one end with gear wheels 2! and 2m meshing with each other, so that the said rolls will rotate in oppo- Rotative power is applied to either of the rolls II) or Illa by means of any suitable prime mover, such as an electric motor 22, conventionally illustrated. Said motor may be connected With one of the lower rolls in any suitable way, a standard type gear, transmission 23, controlled by a shift lever 24, being shown for purposes of illustration,'-'said-transmission being connected with the roll I0. 7

Itwill beobservedthat the rolls II and Ila :5

are of slightly smaller diameter than thegdiameter of the rolls I 0 and Illa, but that theaxes' of the rolls of each set A. and B arelarranged in the same vertical plane; this arrangement, the rolls H and Ila are separatedlaterally'a 10 greater distancethan the rolls IllandfiIOd; fLo- ;cated in the space between the rolls I l'andl Id,

adjacent the tops of the rolls I0 and: Ifldis a guide member 30, which is of approximately tri. m 5

angular cross section to provide diverging guidw ing'faces 3|, 3Ia leading to the respective sets 0f rolls A and B." 1

In operation,ythe upper rolls I I andI Ia are adjusted to provide the desired clearance between them and their under rolls, and rotation is imparted to the roll I8, through the motor 22 and the transmission 23. It will be observed that the said roll It] will rotate in one direction and that the roll I Ilwwill rotate in the ,opposite direction due to the engagement of the gears 2| and 2Ia. 25 The operator first manually opens up or slightly separatesthe lower ends of a pair of sheets and inserts them vertically downward between the top rolls II andIIa, until the lower separated edges of the sheets engage with the apex of the guide member 30. As the'guide member intercepts the lower edges of said sheets continued pressure upon the sheets tends to spread them in opposite directions over the surfaces 3| and 3la, bringing them into engagement with the respective sets of rolls A and B. The opposite rotation of the two sets of rolls causes the sheets to separate and move in opposite directions, the magnetism created as the result of the static electricity developed'during the rotation of the rolls, serving to prevent 40 V slipping of the plates between the rolls. The result of the opposite rotation of the rolls is that the adherence between the sticking sheets is de-v stroyed, and" they are readily separated so that the operator may easily inspect them and pick out any bad sheets, without first piling them and then asserting, as is now the common practice.

The advantages of the'invention will be readily understood by those skilled in the art to which a it belongs. An important advantage is that the tion and described an operative manner of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the forms of its use, what is claimed is:- I

1. A sheet pulling device comprising two pairs of rolls, means for rotatively supporting the rolls,

one roll of each pair being, of smaller diameter than the other and superposed thereon in such manner thattheir. axes; of rotation are inthe same ve1tical1plane,=so that ;the larger rollsziarel'laterally separated a smaller distance than the lateral separation of the superposed rolls, means for ro tating the larger rolls in opposite, directions, and a guide member occupying a horizontal 'planeiapproximately corresponding to the., plane of the topmost portions of the larger rolls an'dinline ameterrthanctheuother, roll of the pair and superwith the spaces between thezlanger-landthwsmaller rolls, said guide member having diverging' por tions leading toward the positions between the top randc-bottoinf rolls-. of therrespective, pairs ofrsuper posed rollszwhereby \thetsheets rare rdelivered to (01913081136: sides. of the device: in general\ horizontal directions.

.2. -.A'-sheetrpu1ling device comprising two pairs V .ofirotativfi y imountedirollsgoriemoll .ofeeaoh pair being :of smaller diameter than :the fOlihGI and :superposed Lthereo'n in suchmarmer .that their axes of mitation: are in .the :same l vertical :plane, so :that'ithe peripheries of the --larger \rolls =.are .elosertcigethen than the peripheries of: thesmaller -ro1ls',-means,-:for adjusting each smaller roll -with :respect toits iarger lower rol1:in-..such;manner -as ..to, maintain :their :axesw in :sai'd vertical plane, .means f or rotatingthe slower :rolls in 'xmposiw directionazande-itriangumnguidezmemberlhaving two of its corners occupying aihorizontalgplane approximately corresponding to the plane of the topmost portions of the larger rolls, and with its other corner located at the bottom of the spaces between the larger and the smaller rolls, the corners of said guide being connected by guide portions leading toward positions between the top and bottom rolls of the respective pairs of superposed rolls whereby the sheets are delivered to opposite sides of the device in general horizontal directions. a g

BIS-A sheet pulling device comprisirigitwo pairs of rolls, bearing blocks for the respective rolls of .each set, said blocks being arranged in superposed pairs, the upper block of each pair being adjustcab'lez'vertieally, said blocks being so constructed andarranged as to support the rolls of each pair,

one roll of each pair of rolls being of smaller diposedthereon in such manner that their axes of rotation are in the same vertical plane, so that rthex-largerirolls are'laterallysspacedr a smal lerliiist-ance Ithan the lateral separation of i the smaller upper Ifbearing rblo'oks, "means :for :rotating the larger 1 rorls :in opposite rlirections, and a =guide -m'ember occupying' a horizontal plane :approxi- 'matelycorresponding to'- the plane of the topmost portions: of 1 the '1arger rolls and in line with the spaces i between the 1 larger and 'the smaller rolls, said "guide 'memb er having-"diverging portions 1 leading toward the positions between thetop and bottom rolls ofthe'respective 'pairs 'ofsuperpo'secl rolls, .whereby the sheets aredlivere'd to opposite sides 'dtthe. "device. in. a .general horizontal direction. 7 I

- D'AVID G. DAVIES.

rolls, adjusting-screws for raising andloweringithe 

